#ifndef __GLUT_WINDOW_H__#define __GLUT_WINDOW_H__class GlutWindow{protected:   int windowID;public:   GlutWindow(void);   ~GlutWindow();   virtual void CallBackDisplayFunc();   virtual void CallBackIdleFunc(void);   virtual void CallBackKeyboardFunc(unsigned char key, int x, int y);   virtual void CallBackMotionFunc(int x, int y);   virtual void CallBackMouseFunc(int button, int state, int x, int y);   virtual void CallBackPassiveMotionFunc(int x, int y);   virtual void CallBackReshapeFunc(int w, int h);      virtual void CallBackSpecialFunc(int key, int x, int y);      virtual void CallBackVisibilityFunc(int visible);   void    SetWindowID(int newWindowID);   int     GetWindowID(void);};#endif